Developers use Arbitrum to build user-friendly decentralized apps (dApps) that can take advantage of the scalability benefits of the Arbitrum Rollup and AnyTrust protocols. Arbitrum's flagship chain, Arbitrum One, was launched in 2021. This was quickly followed by the launch of Arbitrum Nova, a separate AnyTrust chain built for ultra low-cost transactions. In August 2022, Arbitrum One was upgraded to the Arbitrum Nitro stack, bringing a 7-10x upgrade to its scaling capabilities. The distribution of $ARB governance tokens decentralizes governance of Arbitrum One and Arbitrum Nova and their underlying protocols. $ARB tokens can be used to vote on Arbitrum DAO governance proposals, allowing $ARB holders to collectively shape the future of Arbitrum protocols and chains. Token holders can also delegate their voting power to delegates.